Build gives Class NilObjectException

Is that the RubberViews 1.9, I downloaded it. I noticed there is 3 new files created 7/10/2015, 5 total. Is there any change in the documentation or updated documentation.

Current version is 1.91.1. The project is dated July 23, 2015, so is the ReadMe.pdf

But RubberWindow and RubberContainerControl are dated July 10, 2015 and have not been changed.